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Inception: Mercury 2 vs Kwaipilot: KAT-Coder-Air V2.5

KAT-Coder-Air V2.5 (low) leads on average score with 5.4 vs 4.6. Mercury 2 has the lower benchmark cost at $0.030 vs $0.041. Mercury 2 is faster at 829ms vs 10.09s, with pass rates of 22.7% vs 45.5%.

Recommended modelKAT-Coder-Air V2.5 (low)It has the strongest score in this comparison (5.4) and the best overall balance of cost and response time across all 2 models.

Last updated at: 2026-07-18

Metric Mercury 2 Mercury 2 none Release: 2026-02-24 KAT-Coder-Air V2.5 KAT-Coder-Air V2.5 low Release: 2026-07-14
Score 4.6 5.4
Rank #185 #154
Reliability 10.0 9.9
Consistency 9.2 7.4
Tests Correct
Attempt pass rate 22.7% 45.5%
Flaky tests 2 7
Total Runs 66 66
Cost per result 0.734 0.585
Total Cost $0.030 $0.041
Input Price $0.250 / 1M $0.150 / 1M
Output Price $0.750 / 1M $0.600 / 1M
Total Input Tokens 88,704 61,085
Output Tokens 9,564 5,905
Reasoning Tokens 0 46,990
Response Time (avg) 829ms 10.09s
Response Time (max) 4.52s 86.23s
Response Time (total) 18.24s 222.03s

Hamster playing table tennis

Prompt: Create a detailed SVG illustration of a hamster playing table tennis.

#185 Mercury 2

none
Cost
$0.002
Time
1.8s
Tokens
1,514 tok

#154 KAT-Coder-Air V2.5

low
Cost
$0.004
Time
29.9s
Tokens
6,008 tok

Top Models by Score

Score vs Total Cost

Response Time (avg)

Score vs Response Time (avg)

Total Output Tokens

Score vs Total Output Tokens

Category Breakdown

Coding Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Mercury 2 3.4 9.6 0.0% 0 1.03s 7,229 3,088 0
KAT-Coder-Air V2.5 3.5 7.3 11.1% 1 11.06s 7,893 2,001 13,623

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